1. Energy L1: Introduction to Energy
Learning Objectives:
Recall the different forms of energy.
Understand the law of conservation of energy.
Describe energy transfers.

2. Energy Energy is needed for many things to happen.
Can you think of things that need energy to happen?

3. Energy Stores Thermal (heat) Chemical Elastic or Strain
Kinetic (movement)
Gravitational Potential
Magnetic
Heat

4. What do we measure energy in?
Length is measured in …….
Metres
Time is measured in …….
Seconds
Temperature is measured in …….
Degrees Celsius

5. What do we measure energy in?
Energy is measured in…
Joules (J)

6. Kinetic (Movement) Energy Store
An object which is moving, will have kinetic energy in its store

7. Gravitational Energy Store
Objects that are high up, such as an aeroplane will have gravitational energy in its store. The higher the plane goes………
Gravitational

8. Elastic Energy Store
Objects that are stretched or squeezed have elastic energy in their store

9. Thermal Energy Store
Objects that are warm or hot have thermal energy in their store. The hotter the object……
Thermal

10. Chemical Energy Store
Objects that have chemicals that can react (like fuels) have chemical energy in their store

11. Magnetic Energy Store
Magnetic energy is stored when you hold a magnetic material (or another magnet) close to a magnet.

12. Energy store examples This can of petrol has chemical energy in
its store

13. This elastic band has elastic energy in its store

14. This bird flying high has gravitational energy in its store

15. What energy is in the energy store of these objects?

22. Energy cannot be created or destroyed!
Energy Transfers
Energy doesn’t stay in one store forever.
Energy is being constantly transferred from one energy store to another but……..
Energy cannot be created or destroyed!

23. Energy Transfers Name the energy store BEFORE and AFTER the transfer.
Example: Combustion
Before – CHEMICAL
After – THERMAL (HEAT)
Chemical  Thermal

24. Energy Transfers Name the energy store BEFORE and AFTER the transfer.
………………..  ………………….

25. Energy Transfers Name the energy store BEFORE and AFTER the transfer.
………………..  ………………….

26. Energy Transfers Name the energy store BEFORE and AFTER the transfer.
Before – Gravitational
After – Kinetic
Gravitational  Kinetic

27. Energy Transfers Name the energy store BEFORE and AFTER the transfer.
………………..  ………………….

28. Energy Transfers Name the energy store BEFORE and AFTER the transfer.
Before – Elastic
After – Kinetic
Elastic  Kinetic

29. Energy Transfers Name the energy store BEFORE and AFTER the transfer.
………………..  ………………….

30. Energy Transfers Name the energy store BEFORE and AFTER the transfer.
Before – Chemical
After – Kinetic
Chemical  Kinetic

31. Energy Transfers Name the energy store BEFORE and AFTER the transfer.
…………… ……………….

32. Energy Transfers Name the energy store BEFORE and AFTER the transfer.
Before – Kinetic
After – Thermal
Kinetic  Thermal